Ventilator



5am. E3, 1925- LSZZQ R. C. ROOT VENTILATOR Filed Jan. Q 1924 A TTORNEYS.

Patented Jan. 13, 1925.

RALPH C. ROOT, OF INDIANAPOLIS, INDIANA.

vENTmA'ron.

Application'led January 9, 1924. Serial No. 685,133.

To aZZ whom t may concern.'

Be it known that I, RALPH C. Roo'r, a citizenof the United States, and a resident of Indianapolis, county ofjMarion, and State of Indiana, have invented a certain new and useful Ventilator; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, in which like numerals refer to like parts.

This invention relates to a ventilator particularly adapted for use on the cowl of a vehicle, but which` is also applicable for opening and closing `an aperture inthe wall of vany compartment.

Whereas various structures of this character have heretofore been in common use as disclosed in my Letters Patent, No. 1,301,-

975, granted April 29, 1919, it is the particular object of this invention to provide a mounting for the closing shutter and the actuating means therefor such as 'will per- -mit the shutter to be opened not only to extreme open or closed position, but to any intermediate position under spring tension,

so as to prevent any vibration and rattle.

Another feature of the invention resides in the specific means for actuatingand adjusting the position of the shutter, whereby the desired effect is attained in the most simple manner such as will permit the manufacture thereof at low cost.

The full nature of the invention will be understood from the accompanying drawings and the following description and claims:

In the drawings, Fig. 1 is a central vertical section through the shutter and mounting showing a portion of the 'actuatin means in elevation, with the shutter close Fig. 2 is the same as Fig. 1 showing the shutter in extreme open position. Fig. 3 is .a section taken on the line 3-3 of Fig. 1.

In the drawings there is shown that portion of a vehicle comprising the cowl 10 which may be termed a wall, and the instrument board 11. The cowl 10 or wall is provided with an aperture for permitting fresh air to enter the vehicle or compartment to be ventilated. SurroundingA the aperture, there is provided a flanged seating member 12 upon which the shutter- 13 is adapted to seat when closed. The shutter is provided with a downwardly and rearwardly extending apron or bracket 14 which has secured. thereto and extending lengthwise thereof a bar 15` provided with upturned ends 16. The upturned ends 16 are pivotally connected at 17 with the downwardly` extending ears 18 secured to vt-he under side .of the member 12 or the cowl 10. By means of this arrangement the shutter 13 is hingedly or pivotally mounted on the cowl or wall so as to permit it to swing about the pivot points 17 to open, closed or any intermediate position.

Rigidly connected at one end to the centrallower portion of the apron 14, there is a spiral spring 19 in which the rod 20 extends so as to be free to turn therein and support the other end thereof. The rod 20 is provided with a pin 21 which projects between the coils of the spring, whereby the rod 2O may be screwed in and out of the spring, the spring acting as the female threaded member and the rod as the male threaded member. The rod 2() is operated through an extension 22 thereof on which an operating handle 23 is secured,

the extension 22 being mounted in a suitable bushing 24 secured in the instrument board of the vehicle, so that the handle 23 may be positioned on the opposite side thereof from the shutter actuating mechanism and accessible to the operator.

It will be obvious from the fore oing that upon turning the handle 23, the pm 21 will cause the spring 19 to move back and forth on the rod 20 which remains fixed with respect to |the instrument board. Such back and forth movement of the spring acts to move the lower end of the apron 14 back and forth about its pivotal mounting 17 and thereby raise or lower the shutter. Inasmuch as the apron moves about the pivot point 17, the spring connection therewith will be out of alignment with the rod 20, and that portion of the spring between said rod and apron will be distorted from its normal form by the movement of the mechanism and thereby exert a certain yielding pressure upon the shutter when partially open, suflicient to hold it fixedly in position against vibrationor rattle. When the shutter is in closed position, the handle 23 may continue to be turned until it stretches that portion of the spring between the pin 21 and the apron, whereby the shutter will be held down a einst its support under spring tension. fter the shutter has been opened to its extreme position, the handle 23 may be further turned to compress and distort that portion of the spring between the pin 21 and the apron, whereby the compressed spring will exert a yielding force against the apron and thereby retain the shutter in its extreme open position under spring tension.

It will be observed, therefore, that whereas a shutter which is heid in eXtreme open 0r closed positions under spring pressure has been disclosed in my patent above referred to, by means of this arrangement the shutter may be held in any intermediate adjusted position under spring tension also.

The invention claimed is:

l. The combination with a wall having an aperture therein, of an opening and closing mechanism therefor comprising a shutter, means for pivotally mountingsaid shutter on said Wallin .position to open 0r close said aperture, an operating member, and a spiral spring connected at one end to said shutter and at the other end fto said operating member, said spring being adapted to move said shutter to any desired position through the operation of said member and be distorted from its normal form for resiliently maintaining said shutter in a position `intermediate its extreme open and closed posi-tions. l

2. The combination with a wall having an aperture therein, of an opening and closing mechanism therefor comprising a shutter, means for pivotally-mounting said shutter on said wall in position to open or close said aperture, an operating member, and a spiral spring having one end connected with said shutter adapted tobe screwed on said operating member for varying the posi-tion of said shutter.

3. The combination with a wall having an aperture therein, of an opening and closing mechanism therefor comprising a shutter, means for pivotally mounting said shutter on said wall in position to open or close said aperture, a resilient screw member conter, means for pivotally mounting said shutter on said wall in position 'to open or close said aperture, a resilientl screw member, and a rigid screw member, one of said members being fixedly connected with said shutter and the other member rotatably fixed independently of said shutter, said members adapted to screw to and from each other for varyingthe position of said shutter.

5. The combination with a vwall having an aperture therein, of an opening and closing mechanism therefor comprising a shutter, means for pivotally mounting said shutter on said Wall in position to open or close said aperture, and a` pair of inter-engaging screw members, one of said members being resilient, said members being so arranged as to connect said shutter and wall so that said shutter may be actuated by theturning of one member with respect to the other.

6. The combination with a wall having an aperture therein, of an opening and closing mechanism therefor comprising a shutter, means for pivotally mounting said shutter on 'said wall in position to open or close said aperture, a lixedly mounted but rotatable shaft, a spiral spring having one end connected to said shutter and extending rearwardly to receive said shaft therein, and a pin on said shaft adapted to engage said spring, whereby thel turning thereof will cause said spring to be drawn thereon or forced 'therefrom for varying the position of said shutter.

In witness whereof, I have hereunto aiiixed my signature.

RALPH C. ROOT. 

